Ever wondered about that giant stand of bamboo-like plants in your backyard, or community garden, or creek edge, that just keeps getting bigger each year? Have you spent months, or years, or even decades struggling to get rid of it? If so, you’re not alone—and the King County Noxious Weed Control Program is here to help.
Our riparian team is back this summer with its popular free workshop on invasive knotweed control. In it you’ll learn all about invasive knotweeds, how (and when) to control them—including how to borrow and use a stem injector—habitation restoration ideas, and the current battle against knotweed on King County’s rivers.
All sessions will be from 6:30pm to 8:30pm:
- June 8 – Tukwila Community Center, 12424 42nd Avenue South, Tukwila, WA 98168
- June 14 – Mercer Island Community and Event Center, 8236 SE 24th Street, Mercer Island, WA 98040
- June 21 – Carnation Library, 4804 Tolt Avenue, Carnation WA 98014
- June 28 – Maple Valley Library, 21844 SE 248th Street, Maple Valley WA 98038
- July 12 – Meadowbrook Farm in North Bend, 1711 Boalch Ave, North Bend, WA 98045
Space is limited, so sign up soon!
If you want to borrow a stem injector but can’t attend a class, not to worry. Just check out this page, watch the videos, take the quiz, and you’re on your way!
For more information on knotweed or our classes, contact our amazing riparian team.
What is in the stuff injected into the Knotweed stems?
Hi Linda,
Great question. Currently, glyphosate is the only herbicide labeled for hollow stem injection on knotweed. You can find more details about knotweed stem injection and other knotweed control on our Best Management Practices page. You can also look at the knotweed stem injector page on Herbicide Labeling. Be sure to use a product approved for your site, and always follow the label!